A polychlorinated biphenyl (PCB) is an organic chlorine compound with the formula C12H10−xClx. Polychlorinated biphenyls were once widely deployed as dielectric and coolant fluids in electrical apparatus, carbonless copy paper and in heat transfer fluids.
Polychlorinated dibenzodioxins (PCDDs), or simply dioxins, are a group of polyhalogenated organic compounds that are significant environmental pollutants.
Dog food is food specifically formulated and intended for consumption by dogs and other related canines. Like all carnivores, dogs have sharp, pointed teeth, and have short gastrointestinal tracts better suited for the consumption of meat than of vegetable substances. In spite of this natural carnivorous design, dogs have still managed to adapt over thousands of years to survive on the meat and non-meat scraps and leftovers of human existence and thrive on a variety of foods, with studies suggesting dogs' ability to digest carbohydrates easily may be a key difference between dogs and wolves.
Copper extraction refers to the methods used to obtain copper from its ores. The conversion of copper consists of a series of physical and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors.
Pyrometallurgy is a branch of extractive metallurgy. It consists of the thermal treatment of minerals and metallurgical ores and concentrates to bring about physical and chemical transformations in the materials to enable recovery of valuable metals. Pyrometallurgical treatment may produce products able to be sold such as pure metals, or intermediate compounds or alloys, suitable as feed for further processing. Examples of elements extracted by pyrometallurgical processes include the oxides of less reactive elements like iron, copper, zinc, chromium, tin, and manganese.
Pet food is plant or animal material intended for consumption by pets. Typically sold in pet stores and supermarkets, it is usually specific to the type of animal, such as dog food or cat food. Most meat used for nonhuman animals is a byproduct of the human food industry, and is not regarded as "human grade".
Chemetco was formerly one of the largest United States refiners of copper from recycled or residual sources.
The 2007 pet food recalls comprise the contamination and wide recall of many brands of cat and dog foods beginning in March 2007, and the ensuing developments involving the human food supply. The recalls in North America, Europe, and South Africa came in response to reports of renal failure in pets. Initially, the recalls were associated with the consumption of mostly wet pet foods made with wheat gluten from a single Chinese company. After more than three weeks of complaints from consumers, the recall began voluntarily with the Canadian company Menu Foods on 16 March 2007, when a company test showed sickness and death in some of the test animals. Soon after, there were numerous media reports of animal deaths as a result of kidney failure. In the following weeks, several other companies who received the contaminated wheat gluten also voluntarily recalled dozens of pet food brands. One month after the initial recall, contaminated rice protein from a different source in China was also identified as being associated with kidney failure in pets in the United States, while contaminated corn gluten was associated with kidney failure with pets in South Africa. As a result of investigating the 2007 pet food recalls, a broader Chinese protein export contamination investigation unfolded, raising concerns about the safety of the human food supply.
This timeline of the 2007 pet food recalls documents how events related to the 2007 pet food recalls unfolded. Several contaminated Chinese vegetable proteins were used by pet food makers in North America, Europe and South Africa, leading to renal failure in animals fed the contaminated food. Both the centralization of the pet food industry and the speed and manner of the industry and government response became the subjects of critical discussion.
In the People's Republic of China, the adulteration and contamination of several food and feed ingredients with inexpensive melamine and other compounds, such as cyanuric acid, ammeline and ammelide, are common practice. These adulterants can be used to inflate the apparent protein content of products, so that inexpensive ingredients can pass for more expensive, concentrated proteins. Melamine by itself has not been thought to be very toxic to animals or humans except possibly in very high concentrations, but the combination of melamine and cyanuric acid has been implicated in kidney failure. Reports that cyanuric acid may be an independently and potentially widely used adulterant in China have heightened concerns for both animal and human health.
ChemNutra is an American importer of ingredients for food, animal feed and pharmaceuticals based in Summerlin, Nevada Self-described as "The China-Source Experts" they import their products from China and provide them to North American manufacturers. The Chief Executive Officer is Stephen S. Miller and the president is Sally Qing Miller.
Yushō disease (油症) was a mass poisoning by polychlorinated biphenyls (PCBs) which occurred in northern Kyūshū, Japan, in 1968. In January 1968, rice bran oil produced by Kanemi Company in Kyushu was contaminated with PCBs and polychlorinated dibenzofurans (PCDFs) during production. For deodorization, the oil was heated using PCB as the heating medium, circulating through pipes. Due to holes in the pipes the PCB leaked into the rice bran oil. The contaminated rice bran oil was then sold to poultry farmers for use as a feed supplement and to consumers for use in cooking. In February to March 1968, farmers started reporting that their poultry were dying due to apparent difficulty in breathing; altogether 400,000 birds died. About 14,000 people who had consumed the contaminated rice oil were affected in Japan. Of them 500 died. Common symptoms included dermal and ocular lesions, irregular menstrual cycles and a lowered immune response. Other symptoms included fatigue, headache, cough, and unusual skin sores. Additionally, in children, there were reports of poor cognitive development.
Zinc smelting is the process of converting zinc concentrates into pure zinc. Zinc smelting has historically been more difficult than the smelting of other metals, e.g. iron, because in contrast, zinc has a low boiling point. At temperatures typically used for smelting metals, zinc is a gas that will escape from a furnace with the flue gas and be lost, unless specific measures are taken to prevent it.
The Dioxin affair was a political crisis that struck in Belgium during the spring of 1999. Contamination of feedstock with polychlorinated biphenyls (PCB) was detected in animal food products, mainly eggs and chickens. Although health inspectors reported the problem in January, measurements were taken only from May 1999 when the media revealed the case. The then Flemish Liberals and Democrats (VLD) opposition leader Guy Verhofstadt claimed that the government was trying to cover up the so-called "nota Destickere", which proved that several secretaries of state were informed much earlier that the food contained PCBs and dioxins.
Dioxins and dioxin-like compounds (DLCs) are compounds that are highly toxic environmental persistent organic pollutants (POPs). They are mostly by-products of various industrial processes - or, in case of dioxin-like PCBs and PBBs, part of intentionally produced mixtures. They include:
Solvay Indupa is an Argentine petrochemical company formerly owned by Solvay. It was considering selling this business to Braskem, but the project was rejected by the Brazilian competition authority. Solvay Indupa is one of the largest petrochemical companies in Latin America. The company is headquartered in Buenos Aires and has a Brazilian office located in São Paulo.
In 2013 a wide-scale recall of products sold by dairy producer Fonterra was announced after suspected botulism-causing bacteria were found during safety tests. The contaminated whey products had been sold to third parties who use it to produce infant formula and sports drinks. Approximately 1,000 tonnes of consumer product was affected by the recall across seven countries, but no cases of sickened consumers were reported. China, which imports most of its powdered milk from New Zealand, instituted a temporary ban on the import of the ingredient from New Zealand.
